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// Copyright 2025 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package main
import (
"context"
"errors"
"net/http"
"strings"
"testing"
"github.com/google/syzkaller/pkg/coveragedb"
"github.com/google/syzkaller/pkg/coveragedb/mocks"
"github.com/google/syzkaller/pkg/coveragedb/spannerclient"
"github.com/google/syzkaller/pkg/covermerger"
mergermocks "github.com/google/syzkaller/pkg/covermerger/mocks"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/mock"
"google.golang.org/api/iterator"
)
func setCoverageDBClient(ctx context.Context, client spannerclient.SpannerClient) context.Context {
return context.WithValue(ctx, &keyCoverageDBClient, client)
}
func TestFileCoverage_BadRequest(t *testing.T) {
badURL := "/test2/coverage/file?dateto=2025-01-31'&period=month" +
"&commit=c0e75905caf368e19aab585d20151500e750de89&filepath=virt/kvm/kvm_main.c"
c := NewCtx(t)
defer c.Close()
c.setCoverageMocks("test2", nil, nil)
_, err := c.GET(badURL)
var httpErr *HTTPError
assert.True(t, errors.As(err, &httpErr))
assert.Equal(t, http.StatusBadRequest, httpErr.Code)
}
func TestFileCoverage(t *testing.T) {
tests := []struct {
name string
covDB func(t *testing.T) spannerclient.SpannerClient
fileProv func(t *testing.T) covermerger.FileVersProvider
url string
wantInRes []string
}{
{
name: "empty db",
covDB: func(t *testing.T) spannerclient.SpannerClient { return emptyCoverageDBFixture(t, 1) },
fileProv: func(t *testing.T) covermerger.FileVersProvider { return staticFileProvider(t) },
url: "/test2/coverage/file?dateto=2025-01-31&period=month" +
"&commit=c0e75905caf368e19aab585d20151500e750de89&filepath=virt/kvm/kvm_main.c",
wantInRes: []string{"1 line1"},
},
{
name: "regular db",
covDB: func(t *testing.T) spannerclient.SpannerClient { return coverageDBFixture(t) },
fileProv: func(t *testing.T) covermerger.FileVersProvider { return staticFileProvider(t) },
url: "/test2/coverage/file?dateto=2025-01-31&period=month" +
"&commit=c0e75905caf368e19aab585d20151500e750de89&filepath=virt/kvm/kvm_main.c",
wantInRes: []string{
"4 1 line1",
"5 2 line2",
"6 3 line3"},
},
{
name: "multimanager db",
covDB: func(t *testing.T) spannerclient.SpannerClient { return multiManagerCovDBFixture(t) },
fileProv: func(t *testing.T) covermerger.FileVersProvider { return staticFileProvider(t) },
url: "/test2/coverage/file?dateto=2025-01-31&period=month" +
"&commit=c0e75905caf368e19aab585d20151500e750de89&filepath=virt/kvm/kvm_main.c" +
"&manager=special-cc-manager&unique-only=1",
wantInRes: []string{
" 0 1 line1", // Covered, is not unique.
" 5 2 line2", // Covered and is unique.
" 3 line3", // Covered only by "*" managers.
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
c := NewCtx(t)
defer c.Close()
c.setCoverageMocks("test2", test.covDB(t), test.fileProv(t))
fileCovPage, err := c.GET(test.url)
assert.NoError(t, err)
got := string(fileCovPage)
for _, want := range test.wantInRes {
if !strings.Contains(got, want) {
t.Errorf(`"%s" wasn't found in "%s"'`, want, got)
}
}
})
}
}
func staticFileProvider(t *testing.T) covermerger.FileVersProvider {
m := mergermocks.NewFileVersProvider(t)
m.On("GetFileVersions", mock.Anything, mock.Anything).
Return(func(targetFilePath string, repoCommits ...covermerger.RepoCommit,
) covermerger.FileVersions {
res := covermerger.FileVersions{}
for _, rc := range repoCommits {
res[rc] = `line1
line2
line3`
}
return res
}, nil)
return m
}
func emptyCoverageDBFixture(t *testing.T, times int) spannerclient.SpannerClient {
mRowIterator := mocks.NewRowIterator(t)
mRowIterator.On("Stop").Return().Times(times)
mRowIterator.On("Next").
Return(nil, iterator.Done).Times(times)
mTran := mocks.NewReadOnlyTransaction(t)
mTran.On("Query", mock.Anything, mock.Anything).
Return(mRowIterator).Times(times)
m := mocks.NewSpannerClient(t)
m.On("Single").
Return(mTran).Times(times)
return m
}
func coverageDBFixture(t *testing.T) spannerclient.SpannerClient {
mRowIt := newRowIteratorMock(t, []*coveragedb.LinesCoverage{{
LinesInstrumented: []int64{1, 2, 3},
HitCounts: []int64{4, 5, 6},
}})
mTran := mocks.NewReadOnlyTransaction(t)
mTran.On("Query", mock.Anything, mock.Anything).
Return(mRowIt).Once()
m := mocks.NewSpannerClient(t)
m.On("Single").
Return(mTran).Once()
return m
}
func multiManagerCovDBFixture(t *testing.T) spannerclient.SpannerClient {
mReadFullCoverageTran := mocks.NewReadOnlyTransaction(t)
mReadFullCoverageTran.On("Query", mock.Anything, mock.Anything).
Return(newRowIteratorMock(t, []*coveragedb.LinesCoverage{{
LinesInstrumented: []int64{1, 2, 3},
HitCounts: []int64{4, 5, 6},
}})).Once()
mReadPartialCoverageTran := mocks.NewReadOnlyTransaction(t)
mReadPartialCoverageTran.On("Query", mock.Anything, mock.Anything).
Return(newRowIteratorMock(t, []*coveragedb.LinesCoverage{{
LinesInstrumented: []int64{1, 2},
HitCounts: []int64{3, 5},
}})).Once()
m := mocks.NewSpannerClient(t)
// The order matters. Full coverage is fetched second.
m.On("Single").
Return(mReadPartialCoverageTran).Once()
m.On("Single").
Return(mReadFullCoverageTran).Once()
return m
}
func newRowIteratorMock[K any](t *testing.T, cov []*K,
) *mocks.RowIterator {
m := mocks.NewRowIterator(t)
m.On("Stop").Once().Return()
for _, item := range cov {
mRow := mocks.NewRow(t)
mRow.On("ToStruct", mock.Anything).
Run(func(args mock.Arguments) {
arg := args.Get(0).(*K)
*arg = *item
}).
Return(nil).Once()
m.On("Next").
Return(mRow, nil).Once()
}
m.On("Next").
Return(nil, iterator.Done).Once()
return m
}
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